Note： 1.Do not add water over MAX line(less water, more mist) 2.Oil is not included in the package. 3.Please use the Water-Soluble Essential Oils, which will help fill your space with more fragrance without affecting mist output 4.We recommended that you clean the diffuser after each use to avoid clogging and other problems. Empty the water and gently wipe the water tank to dry. DO NOT wash the device directly under the water tap.